instcode · May 9, 2014 23:26 · May 9, 2014
diff --git a/Crypto.java b/Crypto.java
@@ -0,0 +1,70 @@
+package com.puppycloud.game.cheat;
+import java.security.MessageDigest;
+
+import javax.crypto.Cipher;
+import javax.crypto.Mac;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+public class Crypto {
+
+	public static byte[] HMACMD5(String s, String keyString) {
+		try {
+			SecretKeySpec key = new SecretKeySpec(
+					(keyString).getBytes("UTF-8"), "HmacMD5");
+			Mac mac = Mac.getInstance("HmacMD5");
+			mac.init(key);
+
+			byte[] bytes = mac.doFinal(s.getBytes("ASCII"));
+			return bytes;
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+
+	public static String bytesToHexString(byte[] bytes) {
+		StringBuffer buffer = new StringBuffer();
+		for (int i = 0; i < bytes.length; i++) {
+			String hex = String.format("%02x", 0xFF & bytes[i]);
+			buffer.append(hex);
+		}
+		return buffer.toString();
+	}
+
+	public static byte[] stringToHexBytes(String s) {
+		if ((s.length() % 2) == 1) {
+			return new byte[0];
+		}
+
+		byte[] buffer = new byte[s.length() >> 1];
+		for (int i = 0; i < s.length(); i += 2) {
+			buffer[i >> 1] = (byte) Integer.parseInt(s.substring(i, i + 2), 16);
+		}
+		return buffer;
+	}
+
+	public static byte[] AES(boolean encrypt, byte[] key, byte[] iv, byte[] plain) {
+		int mode = encrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE;
+		Cipher cipher;
+		try {
+			cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+			cipher.init(mode, new SecretKeySpec(key, "AES"), new IvParameterSpec(iv));
+			return cipher.doFinal(plain);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+
+	public static byte[] MD5(String message) {
+		try {
+			byte[] bytes = message.getBytes("UTF-8");
+			MessageDigest md = MessageDigest.getInstance("MD5");
+			return md.digest(bytes);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+}